{"id":"CVE-2019-3568","kind":"vulnerability","aliases":["CVE-2019-3568"],"related":[],"title":"Meta Platforms WhatsApp: WhatsApp VOIP Stack Buffer Overflow Vulnerability","description":"A buffer overflow vulnerability in WhatsApp VOIP stack allowed remote code execution via specially crafted series of RTCP packets sent to a target phone number. The issue affects WhatsApp for Android prior to v2.19.134, WhatsApp Business for Android prior to v2.19.44, WhatsApp for iOS prior to v2.19.51, WhatsApp Business for iOS prior to v2.19.51, WhatsApp for Windows Phone prior to v2.18.348, and WhatsApp for Tizen prior to v2.18.15.","summary":"A buffer overflow in the WhatsApp VoIP stack lets an attacker run code on a target's phone by sending a specially crafted series of RTCP packets to their number. CISA lists it as actively exploited in the wild.","severity":"critical","cvss":9.8,"epss":0.30076,"exploited":true,"exploited_at":"2022-04-19T00:00:00+00:00","products":[{"name":"Meta Platforms WhatsApp","fixed":[],"affected":"","ecosystem":"vendor"}],"ecosystems":["vendor"],"tags":["end-users","exploited","mobile","vendor","whatsapp"],"not_affected_if":["fully-patched-app"],"how_to_check":null,"fix":"Update WhatsApp to the latest version through the vendor's app store channel, as CISA directs (Apply updates per vendor instructions).","status":"open","published_at":"2019-05-14T20:29:03+00:00","first_seen_at":"2026-10-23T19:11:52+00:00","triaged_at":"2026-10-23T21:17:46+00:00","updated_at":"2026-10-23T21:57:35+00:00","category":"vendor","confidence":0.7,"triage":{"at":"2026-10-23T21:17:46Z","model":"claude-haiku-5-5","output":{"fix":"Update WhatsApp to the latest version through the vendor's app store channel, as CISA directs (Apply updates per vendor instructions).","reach":"internet","impact":"high","summary":"A buffer overflow in the WhatsApp VoIP stack lets an attacker run code on a target's phone by sending a specially crafted series of RTCP packets to their number. CISA lists it as actively exploited in the wild.","category":"vendor","who_cares":["whatsapp","mobile","end-users"],"confidence":0.7,"needs_auth":"no","worst_case":"Attacker runs code on the phone via crafted VoIP packets, no clicks needed","analyst_note":"Fixed version and exact affected builds are not in the sources; check the vendor advisory and CISA KEV entry for the patched release.","how_to_check":"unknown","needs_analyst":true,"not_affected_if":["fully-patched-app"],"user_interaction":"no","needs_special_setup":"no","severity_if_unknown":"critical"},"cost_usd":0.000459,"input_tokens":2849,"output_tokens":348,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2019':11A,14A '-3568':12A,15A 'activ':60B 'affect':92C 'allow':73C 'android':95C,102C 'attack':36B 'buffer':7A,27B,66C 'busi':100C,113C 'cisa':56B 'code':38B,75C 'craft':48B,79C 'cve':10A,13A 'end':20B 'end-us':19B 'execut':76C 'exploit':22B,61B 'io':108C,115C 'issu':91C 'let':34B 'list':57B 'meta':1A,16A 'mobil':23B 'number':55B,89C 'overflow':8A,28B,67C 'packet':52B,83C 'phone':43B,88C,122C 'platform':2A 'platforms':17A 'prior':96C,103C,109C,116C,123C,130C 'remot':74C 'rtcp':51B,82C 'run':37B 'send':45B 'sent':84C 'seri':49B,80C 'special':47B,78C 'stack':6A,33B,72C 'target':41B,87C 'tizen':129C 'user':21B 'v2.18.15':132C 'v2.18.348':125C 'v2.19.134':98C 'v2.19.44':105C 'v2.19.51':111C,118C 'vendor':24B 'via':77C 'voip':5A,32B,71C 'vulner':9A,68C 'whatsapp':3A,4A,18A,25B,31B,70C,93C,99C,106C,112C,119C,127C 'wild':64B 'window':121C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2019-05-14T20:29:03+00:00","kev":{"dateAdded":"2022-04-19","dueDate":"2022-05-10","requiredAction":"Apply updates per vendor instructions.","knownRansomwareCampaignUse":"Unknown"},"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"nvd@nist.gov","poc_count":0,"sources":[{"source":"kev","external_id":"CVE-2019-3568","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2019-3568","severity":null,"published_at":"2022-04-19T00:00:00+00:00","modified_at":null,"first_seen_at":"2026-10-23T19:11:52+00:00","fetched_at":"2026-10-25T10:39:06+00:00","note":null},{"source":"epss","external_id":"CVE-2019-3568","url":"https://api.first.org/data/v1/epss?cve=CVE-2019-3568","severity":null,"published_at":null,"modified_at":null,"first_seen_at":"2026-10-23T19:13:45+00:00","fetched_at":"2026-10-23T19:13:45+00:00","note":null},{"source":"nvd","external_id":"CVE-2019-3568","url":"https://nvd.nist.gov/vuln/detail/CVE-2019-3568","severity":null,"published_at":"2019-05-14T20:29:03+00:00","modified_at":"2026-06-17T02:35:14+00:00","first_seen_at":"2026-10-23T21:57:35+00:00","fetched_at":"2026-10-23T21:57:35+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}